Shadowing in the deuteron and the newF2n/F2pmeasurements

The quantity 2${\mathit{F}}_2^{\mathit{d}}$(x,${\mathit{Q}}^2$)/${\mathit{F}}_2^{\mathit{p}}$(x,${\mathit{Q}}^2$)-1 is calculated in the region of low x and low and moderate ${\mathit{Q}}^2$ relevant for recent NMC and E665 measurements as well as for the expected final results of the precise NMC analysis of their low x data. The calculations include nuclear shadowing effects and a suitable extrapolation of the structure functions of free nucleons to the low ${\mathit{Q}}^2$ region. The theoretical results are in a good agreement with the NMC data. The shadowing correction to the experimental estimate of the Gottfried sum is quantified.